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Good Samaritan Revive a teammate in a multiplayer match.

Letting Old Ghosts Die Completed Episode 9.

Lost And Found Uncover the secret of Arkham City

Lights Out Kill 10 multiplayer enemies using your melee attack.

Danger Close Get hand picked for Shepherd's elite squad.

Retro Shooter Complete any level without reloading your weapon (excluding 'The Coup' and 'Aftermath').

Sandstorm We are legion

Adventurer Complete a match in all multiplayer modes.

Raising the Bar In the Main Campaign, upgraded one attribute (Health, Shield, or Salts) to its maximum level.

Aerial Assassin In the Main Campaign, killed 20 enemies with a Sky-Line Strike.

Escapist Survive 10 explosions in multiplayer.

Master Ninja Complete any level using only the knife to kill enemies.

Two Birds with One Stone Kill 2 enemies with a single bullet.

Three-some Kill at least 3 enemies with a single shot from a grenade launcher.

Hide And Seek A deadly game of hide and seek

Curiosity Killed the Cat Completed Episode 10.

The Escape Complete 'Hunted' and 'Death From Above' on Veteran difficulty.

Bird on the Ground Shoot down an enemy helicopter with an RPG in the single player campaign.

Thick Skin Completed Episode 11.

The Bog Complete 'The Bog' and 'War Pig' on Veteran difficulty.

Cold Shoulder Infiltrate the snowy mountain side base.

The First Horseman Complete 'Shock and Awe' on Veteran difficulty.

Chatterbox Complete all conversations with the Endurance crew.

Desert Storm Find the Desert Eagle in 'Crew Expendable' and kill 5 enemies with it.

Apprentice Reach Level 5

Ghost Train Fight for survival

Look Out Below Completed Episode 12.

Bleak Falls Barrow Complete "Bleak Falls Barrow"

New Squadron Record Complete the cargo ship mockup in less than 19 seconds.

Industrial Accident In the Main Campaign, killed 20 enemies with a Sky-Hook Execution.

IQ Test Solve the first riddle

The Second Horseman Complete 'Safehouse' on Veteran difficulty.

Kids Just Don't Understand Completed Episode 13.

Master Blaster Kill 2 multiplayer enemies with a single explosive.

Down Boy! Kill a zip-lining enemy player in multiplayer.

Freefall Don't look down

The Lost Tribe Completed Episode 14.

Time Paradox Kill Makarov and complete your mission

Memories of Another World Completed Episode 15.

Monkey Around In multiplayer, escape death 3 times by using the rope ascender.

Dragon Soul Absorb a dragon soul

Exit Stage Right All the world is a stage

Diamond Hard You cleaned out Vangelico to pay back Martin Madrazo.

The Man in the High Tower Find and use the hidden cache in 'Heat'.

Children of the Past Completed Episode 16.

Hangman Defeat 20 enemies with gunfire by aiming while hanging.

Fading Light Completed Episode 17.

Tag 'em and bag 'em Find Rojas in the Favelas.

Dogs. I Hate Dogs. Kill 20 attack dogs with a knife.

Man versus Machine Alert the enemy helicopter in 'All Ghillied Up' and take it down.